A sulfamoyl compound of the general formulae (1): ##STR00001## wherein R.sup.1 and R.sup.2 are each independently C.sub.1-4 alkyl, or R.sup.1 and R.sup.2 together are C.sub.4-6 alkylene or C.sub.4-6 alkyleneoxy, Y is H, halogen, C.sub.1-8 alkyl, C.sub.1-8 alkoxy, C.sub.1-8 alkylthio, C.sub.1-8 haloalkyl, C.sub.1-8 haloalkoxy or C.sub.1-8 haloalkylthio, A is a predetermined heterocyclic group, B is a predetermined heterocyclic group which is identical with or different from A, W is a chemical bond or O, V is O or S, D, E, F and G are each independently N, CR.sup.7, CR.sup.8, CR.sup.9 or CR.sup.10, and R.sup.3, R.sup.4, R.sub.5, R.sub.6, R.sup.7, R.sup.8, R.sub.9, R.sup.10 and R.sup.11 are each independently predetermined group such as H, or an unsubstituted or substituted aliphatic, aromatic or heterocyclic group. The sulfamoyl compound is useful as an agricultural and horticultural fungicide.